@article{10_4064_sm191_2_3,
     author = {Derek Kitson},
     title = {Ascent and descent for sets of operators},
     journal = {Studia Mathematica},
     pages = {151--161},
     year = {2009},
     volume = {191},
     number = {2},
     doi = {10.4064/sm191-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm191-2-3/}
}